In the previous series of articles Part 1, Part 2, and Part 3, we explored architecting a Pandora-style application using the new features of Ext JS 4. We started by applying the Model-View-Controller architecture to a complex UI that has…

The Sencha command utility is a cross-platform command line tool that helps make it easier than ever to develop applications with Sencha Touch 2. The tool consists of many useful automated tasks around the full lifecycle of your applications, from…

Today we're releasing Sencha Touch 2 beta 2, which contains around 100 enhancements, examples, and bug fixes based on your feedback from last week's beta 1. We've been really energized by all your positive feedback on beta 1 and would…

Brand new to Ext JS 4.0 is a class Loader system that makes use of the new dependency system. These two powerful new features allow you to create extensive applications that allow the browser to download digest code as necessary.…

The scalability, maintainability and flexibility of an application is mostly determined by the quality of the application's architecture. Unfortunately, it's often treated as an afterthought. Proofs of concept and prototypes turn into massive applications, and example code is copied and…

XTemplates are are a powerful feature in Ext GWT. Prior to 3.0, XTemplates have been implemented using the same design and code as Ext JS. For 3.0, we decided we would like to replace the Ext JS JavaScript-based implementation with…

Although most modern mobile devices have good hardware specs, almost all of them are still lacking in areas like memory — especially compared to their desktop counterparts. Others either have week graphics processing units (GPUs), or the browser doesn’t properly…

The grid components have been rewritten from the ground up for Ext JS 4 and will provide numerous benefits over the 3.x versions. The 4.0 grid includes greatly improved performance and flexibility, so extending it and adding new functionality will…